The title compound undergoes [4 + 21 Diels-Alder reactions with a number of dienophiles to provide the corresponding cycloadducts. ... Recently, hetero-substituted dienes have been widely used in the synthesis of functionalized ring systems via Diels-Alder reactions.1 The introduction of hetero substituents has a significant influence on the reactivity and regioselectivity of the diene.2 Since the chemistry of 2,3-dihetero-substituted 1,3-dienes may be more ...